Improvement in machines for straightening finger-bars



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Madame fas@ Sffyzwng ammser @baggy gars F1' q l Patented Jan. 16, 1872.

UNITED STATES PATENT OFFICF.

JOSEPH OORNS, OF AKRON, OHIO.

IMPROVEMENT IN MACHINES FOR STRAIGHTENING FINGER-BARS.

Specification forming part of Letters Patent No. 122,815, dated January 16, 1872.

To all whom lt may concern:

Be it known that I, J osEFH GoRNs, of Akron, in the county of Summit and State 0f Ohio, have invented a new and useful mode of Straightening Harvester Fin ger-Bars, of which the following' is a description, reference being had to the accompanying drawing making part of this specification.

. SPECIFICATION.

Figure 1 is a side view of the machine. Fig. 2 is a plan view. Fig. 3 is an end view. Fig. 4 is a View of a finger-bar.

Like letters of reference refer to like parts in the different Views.

The nature of this invention relates to a machine for straightening harvester {ingerbars 5 and the object thereof is to straighten said bars flatwise and edgewise at one operation by means of a vibratory swage or dies, constructed and operated in the manner substantially as follows:

In the drawing, Fig. l, A represents a bedplate, on which are erected the standards B. In said standards is journaled a shaft, C, to which is secured the arms l). To each of the extreme ends of said arms is attached a die or swage, E, ot' the length and width of the linger-bar, and having the form or shape of the bar, as shown at F in the end View, Fig. 3. Lengthwise on each edge of the bed-plate is a corresponding form, G, of the shape and form of the linger-bar, and which forms the lower die or swage. The upper and lower die, when united, are shown at c, Fig. 3, in which it will be seen that they are correspondingly related to each other as male and female dies. The iin ger-bar referred to consists of a flat bar, H, Fig. 4, having a flange, I, turned on one edge, as shown. ASaid bars are rolled out, and on leaving the rollers they are more or less warped and twisted, and therefore require to be straightened before they can be used. This is usually done by iirst straightening the plate, and after which the iiange. This is a matter of much labor and trouble, for the reason that when the plate or fiat part of the bar is made straight, then on straightening the ilange the plate thereby becomes warped or twisted by the hammering of the iian ge. The plate, therefore, requires to be again straightened, and in the process of restraightening the plate the ange becomes twisted. Hence much time and labor is required to straighten the bars, as each part, when straightened separately, mutually crook or twist each other out of line. To avoid this trouble and labor is the purpose of this machine, and which is operated as follows:

The bar is laid upon the lower die, and which, having the same configuration, will tit therein, or so much so as its warped or twisted condition will admit of. The upper die is now made to fall upon the bar by means of the handles J, whereby a vibratory action is given to the arms. The die F, as it falls upon the bar, strikes it upon the plate or broad tlat side and at the same time upon the flange, thereby hammering the plate or the bar and the flange both at once and forcing it into the lower die, thereby straightening both the ila-t part of the bar and the lian ge at once. By this means the linger-bar is easily and quickly made perfectly straight, so that no subsequent hammering is needed to iit it for use. By this machine two bars can be straightened at once, one upon each side of the bed-plate, so that when the upper die F' is ascending the upper corresponding die F descends and strikes the bar on that side, the two dies counterbalancin g each other hence but littlelaboris required to vibrate the arms and alternately strike the linger-bar, one bar by the die F and the other by the die F.

Claim.

pose set forth.

JOSEPH OORNS.

Witnesses J. H. BURRIDGE,

D. L. HUMPHREY. (125) 

